Assighob to amemcami



A. H. EMERSON.

MARKING DEVICE.

APPLICATION FILED JUNE 26, I913.

Patented Aug. 8, 1916.

WITNESSES: l/Vl/E/VTOI? W ALFRED HEMERSON nrnrnn snares raanaw canton.

ALFRED H. EMERSON, 0F SOUTHBRIDGE, MASSACHUSETTS, ASSIGNOB. T0 AIEERICANOPTICAL COMPANY, OF SOUTHBRIDGE, MASSACHUSETTS, A VOLUNTARY ASSO-CIATION.

MARKING DEVICE.

To all whom it may concern:

Be it known that I, ALFRED H. EMERSON, a subject of the King of England,residing at Southbridge, in the county of Worcester and State ofMassachusetts, have invented certain new and useful Improvements inMarking Devices, of which the following is a specification.

My invention relates to improvements in marking devices, and hasparticular reference to an improved device for use in marking indeliblyon glass.

The leading object of my invention is the provision of a device whichmay be employed for the rapid and permanent marking of glass or othersimilar material.

A further object of my invention is the provision of a device which maybe employed for various forms of marking which it has the slow anddangerous process of acid etchmg.

Another object of my invention is the provision of a novel motor and ofa novel gage for use in conjunction therewith which shall particularlyadapt the motor and parts for use in marking.

Other objects and advantages of my invention should be readilyapparentby reference to the following specification taken in connectionwith the accompanying drawings, and it will be understood that I maymake any modifications in the specific details of construction shown anddescribed within the scope of the appended claims without departing fromor exceeding the spirit of my invention.

Figure I represents a perspective View of one form of my inventionattached to the arm of a pantograph or similar holder. Fig.

II represents a top plan view of my device. Fig. III represents avertical sectional view on the line III-III of Fig. II, and Fig. IVrepresents an enlarged fragmentary sectional view illustrating the useof my marking device.

In-the drawings, in which similar characters of reference are employedto denote corresponding parts throughout the several views, the numeral1 designates the support ing arm or handle for my device, which may beof any desired form, it being understood that my device may be eithermanipulated by hand, by being attached to a pantograph or similarapparatus, or in any other de- Specification of Letters Patent.

been possible to effect hitherto only by jects beyond the Patented Aug.8, 19116.

Application filed June 26, 1913. Serial No. 775,9as.

sired manner, Secured to the arm']. is a casing 2 having dependingtherefrom the sleeve 3, to the lower portion of which is adjustably anddetachably secured the gage sleeve 4, withinwhich is journaled the rotorshaft 5 having on its lower end the marking point 6. Said spindle 5 hassecured thereto the spoon shaped vanes 8 which are disposed within thecasing 2, force being applied to these vanes to rotate the spindle, as

hereinafter described. To insure smooth non-vibrating operation of therotor I preferably mount within the sleeve 3 the bushing member 9 whichsurrounds but is spaced from the spindle 5 to provide a pocket receivingthe spring 10 bearing against the sliding washer member 11, which inturn bears against a, suitable collar on the spindle. Y

The upper end of the spindle is hardened and flat, bearing against thebearing point 12 on the screw 7 which extends upward through the crosspiece 13 of the casing, a nut lt serving to lock the screw in desiredadjusted position, the adjustment of. the screw forcing the spindledownward against the pressure of the spring 10 or allowing the same torise as desired, this in turn regulating the amount which the point 6prolower end of the gage sleeve 4:.

It is to be noted that while the sleeve 4; makes a comparatively tightfit with the spindle, the members 10 and 11 loosely engage the same,allowing a certain amount of lateral play, while the bearing 12 engagingthe flattened upper end of the spindle also tends to allow this play,the bearing sliding over the end of the spindle. The purpose of this isto allow the spindle to automatically adjust itself in correct positionwhen rotating instead of the chattering or vibrating, as

. is liable to be the case when a spindle rotating at a high rate ofspeed is fixedly held in bearings.

To rotate the spindle and point I preferably employ a blast of suitableactuating fluid such as compressed air, directed against the vanes 8 bythe nozzle 15, a supply pipe or hose 16 furnishing the fluid to thenozzle and the force of the fluid preferably being such as to drive therotor at a speed of not less than 5,000 revolutions per minute.

It will be understood by those conversant with the art of making glass,metal and other like hard substances that it is preferable to have thesurface being operated upon suitablymoist'ened, and in the use of mydevice I cause the said moistening fluid to feed to the work from therotor and marking point and thus not only insure moistening'of thatportion of the surface being operated upon but also cause the said fluidto serve as a lubricant and prevent overheating of the sleeve withinwhich the rotor is journaled. To accomplish this result, I form in thesleeve 3 an aperture extending to the bore thereof and then secure tothe sleeve the feed pipe 17 preferably having an upwardly projectingportion bearing a reservoir 18 for containing the fluid.

By reference particularly to Fig. IV the operation of my device whenused for mark- I ing will be readily understood, and it will be seenthat the lower end of the sleeve 4 is tapered and terminates in a bead19 which rests on the surface 20 being operated upon. This shaping ofthe lower end of the sleeve allows it to rest on either plano, concaveor convex surfaces and serve as a depth gage to limit the depth whichthe point 6 bites into the surface 20 being operated upon. As beforementioned, this biting in, in ordinary marking work is preferably but afew thoube understood, however, that the rapid rotasandths of an inch,just suflicient, in other words, to leave a mark on the surface withoutsufliciently cutting the same so as to cause cracking or breakingthereof. It will tion caused by my motor will cause the point 6 tocontinue downward into the lens or.

other member 20 being marked and that if the point projects sufficientlyfrom the gage sleeve and is held stationary it will serve to drill ahole through the member 20 or for other similar purposes.

From the foregoing description taken in connection with the accompanyingdrawing, the construction and operation of my improved marking deviceshould be readily understood, and it will be seen that I have provided asimple, inexpensive and durable construction for the desired purpose.

I claim:

1. In a device of the character described, the combination with abearing and a rotor having a marking portion projecting from thebearing, of a fluid supply in communication with the bearing, wherebysaid fluid will flow into the bearing and along the rotor and markingpoint to the work.

2. A device of the character described, in

eluding a casing member having an adjustable gage sleeve at the lowerend thereof, a

spindle having a point projecting beyond the gage sleeve, a floatingjournal for the upper portion of the spindle, a bearing havingproject-ion of the point from the I

